Radiating type oil pan for internal combustion engines



Feb. 19, 1935. KQE. LYMAN 1,991,613

I RADIATING TYPE OIL PAN FOR INTERNAL COMBUSTION ENGINES F iled Nov. :5, 1930 Z mf .1 z/Q "I Jennetklfiiymarg .Patentedl Feb. 19, 1935 UNITED STATE SPATE 7 139L618 NT] OFFICE. I

RADIATING TYPE Oil. PAN FOR INTERNAL COMBUSTION ENGINES Kenneth E. Lyman,;Rockford, 111., assignor to Borg-Warner Corporation, Chicago, 111., a corporation of r Illinois Appnennm November 3, 1930, Serial N 0. 492,997 V 2 Claims. (o1.1s4 104)' This invention relates to internal combustion engines andehas more particular referenceto a means for .cooling fluid adapted to -circulate in the engine. T 1 r In orderthat the viscosity-of the'oil in an engine may be maintained atsuch adegree as will insure the desired lubricating quality of the oil,

it is necessary thatfthe temperature of the oil I for use in connection, with anyltype of engine.-

In carrying out my invention I provide an improved oil pan adapted to replace present oil pan construction an'd'having'its walls provided with a plurality of outwardly extending substantially parallel heat dissipating fins. The fins thus employediniconnection with engines not having formed provide a plurality of elongated narrow pockets which increase tr'emendouslythe amount of surface contact between the oil and'the pan.

The walls of the pan adjacent theflns form with the finsa continuous wall of substantially uni;

This construction is extremely form thickness. simple, involving no moreparts than arenow a cooling device, and may be manufactured at a very low cost. l

in the specification and. the accompanying the plane indicated by. the lines II-II Fig- 9 ure 1. I v

Referring now to the drawing, wherein the i same part is indicated in'each case by'the same reference character, I designate at A an internal combustion engine having the usual upper crank case portion ,3, provided with a flange C to-which the oil pan is adapted to'be'secured. Y

The oil panconstructed in accordance with my invention is indicated generally at 1 and includes a channel shaped member corresponding inwidth and over-all length substantially with that of the engine crank case portion B. This pan is pro- .vided with a peripheral outstanding flange 2 adapted to be'fastened to the flange C of'the upper crank-case portion B in the usual manner. While the pan 1 may be formed in any desired manner, I have illustrated the same as being provided. with hollow fins along its side and 7 bottom walls and extending longitudinally of the pan, the end walls 5 and 6 being welded to the opposite ends of the walls 3 and 40f the pan. In order to' provide clearance for the proper manipulation of the nuts D for fastening the flange 2 to the V -1' lange 3 the uppermost fins 7 are shortened.

The walls 3 andetogether'with the ribs 7 and s form, a continuous wall of substantially uniform' area of contact both with'the oil in the pan and with the outside air, thereby greatly enhancing,

the cooling effect,- of the outside air on the oil.

The wallsof each hollow fin are substantially parallel to each other and are closely spaced to provide a pocket which is substantially deeper than wide to enhance heat transfer, the bottom finsserving also to collect sediment such as grit main path of flow of the lubrithickness, providing a tremendously increased '7 mg qualities of theoil by maintaining the latter 1 V at a sufiiciently-safe low temperature.

i I'am aware that numerous details of onstr Other and further important objects of this uc invention will beapparent from'the disclosures tion'may be varied through a wide range without departing from the spirit of this invention, and I,

therefore; do not purpose limiting the patent granted otherwise than is necessitated by the prior art.

' 1. A crankcase closure member and lubricant sump-comprising integrally connected side and bottom walls having outwardly extending hollow fins, the connectionbetween said side and bottom walls beinga reversely folded portion forming a 1 hollow fin.

[2. As an article of manufacture, an, open topped crank case member havinga smooth interior and shapedfor attachment to the bottom "of a crank case to form a lubricant sump as a part. of the crank. case, comprising integrally 

